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September 14, 2022 10:31 am GMT

NVIDIA RTX 4080 12GB and 16GB Based on Different Chips, Vastly Different Shader Counts

When we first got news about NVIDIA's upcoming GeForce RTX 4080 "Ada" coming in 12 GB and 16 GB variants, we knew there was more setting the two apart than just memory size and memory bus-width. Turns out there's a lot more. According to detailed specifications leaked to the web, while the 16 GB variant of the RTX 4080 is based on the same AD103, the second largest chip after the AD102; the 12 GB RTX 4080 is based on the smaller AD104 chip which has a physically narrower memory bus.

It looks like NVIDIA is debuting the RTX 40-series with at least three modelsRTX 4090 24 GB, RTX 4080 16 GB, and RTX 4080 12 GB. The RTX 4090 is the top-dog part, with the ASIC code "AD102-300-xx." It's endowed with 16,384 CUDA cores, a boost frequency of up to 2.52 GHz, 24 GB of 21 Gbps GDDR6X memory, and a typical graphics power (TGP) of 450 W, which is "configurable" up to 600 W. The RTX 4080 16 GB is based on the AD103-300-xx" comes with 9,728 CUDA cores, a boost frequency of 2.50 GHz, and 16 GB of 23 Gbps GDDR6X memory across a narrower memory bus than the one the RTX 4090 comes with. This card reportedly has a 340 W TGP configurable up to 516 W.

Original Link: https://www.techpowerup.com/298853/nvidia-rtx-4080-12gb-and-16gb-based-on-different-chips-vastly-different-shader-counts

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